Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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AfterFast, Reliable Home Additions & ADU Across Boyle Heights
A home addition or ADU in Boyle Heights typically runs $45,000 to $130,000, with garage conversions on the lower end and new detached units on the higher. Most Boyle Heights homeowners call us because their family has outgrown the house, or because that rear structure everyone assumed was fine turns out to be unpermitted. We serve all of 90023, from the flats near Mariachi Plaza up into the hills off Soto Street. Call (877) 610-1318 for a free estimate.
If you live in Boyle Heights, you already know the drill: the house has been in the family for forty years, the back bedroom was added by an uncle in the 1980s, and the garage has been used as living space since before anyone can remember. That’s normal here. What matters is finding a contractor who doesn’t panic when the permit history doesn’t match what’s standing. We don’t. Tom Barrett has been in LA construction since 1998, and his sons run our crews through Boyle Heights every week.
Why Barrett & Sons Construction Is Boyle Heights’s Preferred Home Additions & ADU Company
Tom Barrett publishes his name, his address, and his license number. You can look it up before you sign anything, and we mean that. No shell company, no out-of-state call center. Boyle Heights customers call us because word gets around on the Eastside: the change order comes in writing before work starts, and the permit inspector actually signs off.
Our Home Additions & ADU team knows the housing stock here. Boyle Heights is dominated by 1910s to 1940s wood-frame bungalows and small multi-family buildings, which means original knob-and-tube wiring, galvanized plumbing that’s rusted through, and unpermitted rear additions that need legalization before anyone swings a hammer. A contractor who mostly works the newer Eastside communities, like Alhambra or Monterey Park, isn’t prepared for what’s behind the stucco here. We are. And when you call, a live person answers. Not a voicemail box, not a phone tree. That matters when you’re standing in a house with no plan and three generations waiting.
Our Home Additions & ADU Services in Boyle Heights
ADU Design & Permitting
Boyle Heights sits under Los Angeles’s ADU ordinance, which is a different animal from what most counties deal with. Many properties that look like single-family homes on the street actually contain two or three informal dwelling units built over decades. We pull the full permit history and do a site walk before we bid, because discovering an unpermitted rear unit mid-job can halt the whole project and trigger a full legalization process. Our design team handles the architectural drawings, the structural review, and the permit application so you’re not making five trips to a city office downtown. Permits pulled and inspections signed on every eligible job.
Garage Conversion ADU
Garage conversion ADUs in Boyle Heights usually run $30,000 to $80,000 depending on the condition of the existing slab and framing. The catch here is that most Boyle Heights garages were never built to code in the first place. The wood-frame walls sit directly on old concrete, there’s no moisture barrier, and the roof has been leaking onto the drywall for a decade. We handle the hazmat side too: lead paint and asbestos abatement are a near-constant part of these projects in a neighborhood with this much pre-1978 housing stock. The result is a legal, rentable unit with its own electrical panel and a permit the city will actually recognize.
New Detached ADU
A new detached ADU in Boyle Heights typically runs $90,000 to $220,000. That’s not a bait price, that’s the real range once you factor in foundation work on sloped lots, utility trenching, and the seismic requirements under LA Ordinance 183893. The hillside lots up near the 5 Freeway have drainage and footing concerns that flat East LA doesn’t, so we grade and compact properly before the first form goes in. We build with materials you can look up, not mystery brands off a van.
Junior ADU & Interior Conversion
A junior ADU, usually an enclosed porch or a sectioned-off part of the existing home, runs $45,000 to $75,000 in Boyle Heights. This is the most common request we get from multi-generational families who need space for aging parents without adding a full structure. The catch is that many of these spaces were enclosed informally decades ago, which means the ceiling height, egress window, and electrical are all out of compliance. We bring them into code, add a small kitchenette or bathroom where the layout allows, and file the proper paperwork so it’s a legal unit, not a liability. We also handle kitchen expansions when families add on: our Kitchen Remodeling in Boyle Heights work often runs side by side with a Jr. ADU to make the whole floor plan function again.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Boyle Heights
When we pour concrete for a new ADU foundation or a driveway that meets city standards, we stock Quikrete and Oldcastle products because they hold up in Boyle Heights’s dry heat and occasional heavy El Niño rain. For paver patios and walkways that tie an ADU pad into the existing yard, we often recommend Techo-Bloc: the color doesn’t fade under an inland sun that’s harsher than anything on the coast. No builder-grade mystery products, nothing we wouldn’t put on our own place. If you’re adding a bathroom as part of the ADU, we also handle the full Bathroom Remodeling in Boyle Heights scope so you’re not juggling two crews.
Common Home Additions & ADU Problems We See in Boyle Heights Homes
- Unpermitted rear additions that surface during a permit search. Boyle Heights has one of the highest concentrations of informal rear units in Los Angeles. We’ve seen homes on Savannah Street and along Whittier Boulevard where the tax record shows 900 square feet and the tape measure shows 1,500. We legalize before we build.
- Seismic soft-story compliance under LA Ordinance 183893. Older Boyle Heights homes with a garage underneath or a second story over open framing often need structural retrofitting before an addition or ADU can be approved. We handle the engineering, not just the framing.
- Dry-rot and stucco cracking from the inland heat. Boyle Heights sits east of the LA River in a microclimate that runs hotter and drier than the coast. South-facing and west-facing siding bakes, old stucco cracks, and wood framing behind it rots. We inspect and repair before we add on top of it.
- Drainage and footing movement on hillside lots. During rare heavy El Niño events, sloped lots in the hills around the 5 Freeway see real drainage problems. Older footings shift. We don’t pour a new foundation until the site drainage is handled, because an ADU on a moving hillside is an expensive problem waiting to happen.
Pricing for Home Additions & ADU in Boyle Heights, CA
We Also Serve Cities Near Boyle Heights
The Home Additions & ADU in Boyle Heights team also covers East Los Angeles, Maywood, Commerce, and Bell. Same crew, same written change orders, same permits pulled, same 90-Day Done Right Promise.
Serving Boyle Heights, CA - Our Local Coverage Area
We’re based in the Boyle Heights Roofing area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Home Additions & ADU in Boyle Heights
Crews serving Windows & Doors - Boyle Heights are scheduled from our Los Angeles office, and a live person answers the phone 24/7, so you’ll reach someone same day. We do free site walks and estimates in 90023, including the flats near Mariachi Plaza and the hillside streets off Soto. Call (877) 610-1318 to set one up.
Yes. We work throughout 90023, from the commercial corridor along Cesar Chavez Avenue to the residential streets north of Whittier Boulevard and up into the hills near the 5 Freeway. No trip charge inside the county for estimates.
Yes, and in Boyle Heights that’s often required before we can even pull the ADU permit. We pull the full permit history, do a site walk, and handle the legalization process through the city. This is the single most common issue we see in Boyle Heights: older homes here have decades of informal additions, and none of it can be ignored once you file.
Only if you change the scope, and even then, only with a written change order you sign first. Every allowance, every material selection, every change is in writing before any work happens. That’s the Barrett & Sons rule, and it’s on the contract, not buried in fine print. Call (877) 610-1318 for an exact quote; estimates are free.
Yes. The 90-Day Done Right Promise is written on every contract: if it’s not done right, Tom Barrett comes back and makes it right, one call. It applies to every job in Boyle Heights, same as anywhere else we work.
Contact Barrett & Sons Construction in Boyle Heights
If you’re weighing a home addition or ADU on your Boyle Heights property, start with a free estimate. You’ll get a written line-item quote, not a verbal number. You’ll talk to someone who knows the permit history headaches of 90023 and doesn’t shy away from them. Call (877) 610-1318 today, and ask about the 10% Senior & Veteran discount if it applies.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Boyle Heights and the surrounding Eastside communities.